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<a class="jxr_linenumber" name="1" href="#1">1</a>   <strong class="jxr_keyword">package</strong> com.google.code.guava.base;
<a class="jxr_linenumber" name="2" href="#2">2</a>   
<a class="jxr_linenumber" name="3" href="#3">3</a>   <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="4" href="#4">4</a>   <em class="jxr_javadoccomment"> * Helper class for generating {@link RuntimeException RuntimeExceptions} from</em>
<a class="jxr_linenumber" name="5" href="#5">5</a>   <em class="jxr_javadoccomment"> * incoming Exceptions.</em>
<a class="jxr_linenumber" name="6" href="#6">6</a>   <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="7" href="#7">7</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../com/google/code/guava/base/Exceptions.html">Exceptions</a>{
<a class="jxr_linenumber" name="8" href="#8">8</a>   
<a class="jxr_linenumber" name="9" href="#9">9</a>       <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="10" href="#10">10</a>  <em class="jxr_javadoccomment">     * Default message for generated {@link RuntimeException RuntimeExceptions}.&lt;br /&gt;</em>
<a class="jxr_linenumber" name="11" href="#11">11</a>  <em class="jxr_javadoccomment">     * Value: {@value}</em>
<a class="jxr_linenumber" name="12" href="#12">12</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="13" href="#13">13</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String DEFAULT_MESSAGE = <span class="jxr_string">"Unknown Error"</span>;
<a class="jxr_linenumber" name="14" href="#14">14</a>  
<a class="jxr_linenumber" name="15" href="#15">15</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="16" href="#16">16</a>  <em class="jxr_javadoccomment">     * Creates a {@link RuntimeException} with a message built using</em>
<a class="jxr_linenumber" name="17" href="#17">17</a>  <em class="jxr_javadoccomment">     * {@link String#format(String, Object...)}.</em>
<a class="jxr_linenumber" name="18" href="#18">18</a>  <em class="jxr_javadoccomment">     * </em>
<a class="jxr_linenumber" name="19" href="#19">19</a>  <em class="jxr_javadoccomment">     * @param message</em>
<a class="jxr_linenumber" name="20" href="#20">20</a>  <em class="jxr_javadoccomment">     *            the message template</em>
<a class="jxr_linenumber" name="21" href="#21">21</a>  <em class="jxr_javadoccomment">     * @param params</em>
<a class="jxr_linenumber" name="22" href="#22">22</a>  <em class="jxr_javadoccomment">     *            the template parameters</em>
<a class="jxr_linenumber" name="23" href="#23">23</a>  <em class="jxr_javadoccomment">     * @return a RuntimeException</em>
<a class="jxr_linenumber" name="24" href="#24">24</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="25" href="#25">25</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> RuntimeException create(<strong class="jxr_keyword">final</strong> String message,
<a class="jxr_linenumber" name="26" href="#26">26</a>          <strong class="jxr_keyword">final</strong> Object ... params){
<a class="jxr_linenumber" name="27" href="#27">27</a>          <strong class="jxr_keyword">return</strong> createRuntimeException(<strong class="jxr_keyword">null</strong>, message, params);
<a class="jxr_linenumber" name="28" href="#28">28</a>      }
<a class="jxr_linenumber" name="29" href="#29">29</a>  
<a class="jxr_linenumber" name="30" href="#30">30</a>      <strong class="jxr_keyword">static</strong> RuntimeException createRuntimeException(<strong class="jxr_keyword">final</strong> Exception e,
<a class="jxr_linenumber" name="31" href="#31">31</a>          <strong class="jxr_keyword">final</strong> String message, <strong class="jxr_keyword">final</strong> Object ... parameters){
<a class="jxr_linenumber" name="32" href="#32">32</a>          <strong class="jxr_keyword">final</strong> String expMessage;
<a class="jxr_linenumber" name="33" href="#33">33</a>          <strong class="jxr_keyword">if</strong>(message != <strong class="jxr_keyword">null</strong>){
<a class="jxr_linenumber" name="34" href="#34">34</a>              expMessage = String.format(message, parameters);
<a class="jxr_linenumber" name="35" href="#35">35</a>          }<strong class="jxr_keyword">else</strong> <strong class="jxr_keyword">if</strong>(e != <strong class="jxr_keyword">null</strong>){
<a class="jxr_linenumber" name="36" href="#36">36</a>              expMessage = findMessageInExceptionTree(e);
<a class="jxr_linenumber" name="37" href="#37">37</a>          }<strong class="jxr_keyword">else</strong>{
<a class="jxr_linenumber" name="38" href="#38">38</a>              expMessage = Exceptions.DEFAULT_MESSAGE;
<a class="jxr_linenumber" name="39" href="#39">39</a>          }
<a class="jxr_linenumber" name="40" href="#40">40</a>          <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">new</strong> IllegalStateException(expMessage, e);
<a class="jxr_linenumber" name="41" href="#41">41</a>      }
<a class="jxr_linenumber" name="42" href="#42">42</a>  
<a class="jxr_linenumber" name="43" href="#43">43</a>      <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> String findMessageInExceptionTree(<strong class="jxr_keyword">final</strong> Exception e){
<a class="jxr_linenumber" name="44" href="#44">44</a>          Throwable current = e;
<a class="jxr_linenumber" name="45" href="#45">45</a>          <strong class="jxr_keyword">while</strong>(current.getMessage() == <strong class="jxr_keyword">null</strong>){
<a class="jxr_linenumber" name="46" href="#46">46</a>              <strong class="jxr_keyword">if</strong>(current.getCause() == <strong class="jxr_keyword">null</strong>){
<a class="jxr_linenumber" name="47" href="#47">47</a>                  <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="48" href="#48">48</a>              }<strong class="jxr_keyword">else</strong>{
<a class="jxr_linenumber" name="49" href="#49">49</a>                  <strong class="jxr_keyword">if</strong>(current.getCause() == current){
<a class="jxr_linenumber" name="50" href="#50">50</a>                      <em class="jxr_comment">// sanity check</em>
<a class="jxr_linenumber" name="51" href="#51">51</a>                      <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="52" href="#52">52</a>                  }
<a class="jxr_linenumber" name="53" href="#53">53</a>                  current = current.getCause();
<a class="jxr_linenumber" name="54" href="#54">54</a>              }
<a class="jxr_linenumber" name="55" href="#55">55</a>  
<a class="jxr_linenumber" name="56" href="#56">56</a>          }
<a class="jxr_linenumber" name="57" href="#57">57</a>          <strong class="jxr_keyword">return</strong> current.getMessage() == <strong class="jxr_keyword">null</strong>
<a class="jxr_linenumber" name="58" href="#58">58</a>          ? Exceptions.DEFAULT_MESSAGE
<a class="jxr_linenumber" name="59" href="#59">59</a>          : current.getMessage();
<a class="jxr_linenumber" name="60" href="#60">60</a>      }
<a class="jxr_linenumber" name="61" href="#61">61</a>  
<a class="jxr_linenumber" name="62" href="#62">62</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment">     * Create a {@link RuntimeException} that wraps the supplied exception. The</em>
<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment">     * exception's message will be the first non-null message found in the</em>
<a class="jxr_linenumber" name="65" href="#65">65</a>  <em class="jxr_javadoccomment">     * exception hierarchy of the supplied exception, or</em>
<a class="jxr_linenumber" name="66" href="#66">66</a>  <em class="jxr_javadoccomment">     * {@link #DEFAULT_MESSAGE} if no such message can be found.</em>
<a class="jxr_linenumber" name="67" href="#67">67</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="68" href="#68">68</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> RuntimeException rethrow(<strong class="jxr_keyword">final</strong> Exception exp){
<a class="jxr_linenumber" name="69" href="#69">69</a>          <strong class="jxr_keyword">return</strong> rethrow(exp, <strong class="jxr_keyword">null</strong>);
<a class="jxr_linenumber" name="70" href="#70">70</a>      }
<a class="jxr_linenumber" name="71" href="#71">71</a>  
<a class="jxr_linenumber" name="72" href="#72">72</a>      <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="73" href="#73">73</a>  <em class="jxr_javadoccomment">     * Create a {@link RuntimeException} that wraps the supplied exception. The</em>
<a class="jxr_linenumber" name="74" href="#74">74</a>  <em class="jxr_javadoccomment">     * exception's message will be created by applying</em>
<a class="jxr_linenumber" name="75" href="#75">75</a>  <em class="jxr_javadoccomment">     * {@link String#format(String, Object...)} on the &lt;code&gt;message&lt;/code&gt;</em>
<a class="jxr_linenumber" name="76" href="#76">76</a>  <em class="jxr_javadoccomment">     * parameter and the optional supplied parameters, if &lt;code&gt;message&lt;/code&gt;</em>
<a class="jxr_linenumber" name="77" href="#77">77</a>  <em class="jxr_javadoccomment">     * is not null. If the &lt;code&gt;message&lt;/code&gt; parameter is null, the first</em>
<a class="jxr_linenumber" name="78" href="#78">78</a>  <em class="jxr_javadoccomment">     * non-null message found in the exception hierarchy of the supplied</em>
<a class="jxr_linenumber" name="79" href="#79">79</a>  <em class="jxr_javadoccomment">     * exception will be used, or {@link #DEFAULT_MESSAGE} if no such message</em>
<a class="jxr_linenumber" name="80" href="#80">80</a>  <em class="jxr_javadoccomment">     * can be found.</em>
<a class="jxr_linenumber" name="81" href="#81">81</a>  <em class="jxr_javadoccomment">     */</em>
<a class="jxr_linenumber" name="82" href="#82">82</a>      <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">static</strong> RuntimeException rethrow(<strong class="jxr_keyword">final</strong> Exception e,
<a class="jxr_linenumber" name="83" href="#83">83</a>          <strong class="jxr_keyword">final</strong> String message, <strong class="jxr_keyword">final</strong> Object ... parameters){
<a class="jxr_linenumber" name="84" href="#84">84</a>          <strong class="jxr_keyword">return</strong> createRuntimeException(e, message, parameters);
<a class="jxr_linenumber" name="85" href="#85">85</a>      }
<a class="jxr_linenumber" name="86" href="#86">86</a>  
<a class="jxr_linenumber" name="87" href="#87">87</a>      <strong class="jxr_keyword">private</strong> <a href="../../../../../com/google/code/guava/base/Exceptions.html">Exceptions</a>(){}
<a class="jxr_linenumber" name="88" href="#88">88</a>  
<a class="jxr_linenumber" name="89" href="#89">89</a>  }
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